Distortion in amps;most/least annoying?

Any kind of coloration. Enhanced mids, rolled-off highs....
I don't need the the amps to interpret, filter or exaggerate , just amplify as honestly and competently as possible. It's not always pretty and it's easy to be tricked by a convincing liar.

Right now I'm looking to add sone second order distortion to the upper mids. Might bias the drivers hotter. Intrestingly my speakers (Omega) are wired with bigger gage on the positive than the negitave. I wonder?

The worse and most annoying i have ever had in an amp is static through speakers. Its happening right now and its really p*ssing me off as i cannot get it out of my head, even when the music is playing. That small background noise you just know is there somewhere is just sooooo annoying.